* {
    /*清除内外边距*/
    margin: 0;
    padding: 0;
}

.container {
    width: 800px;
    /*设定版心居中对齐*/
    margin: 0 auto;
    background-color: white;
}

header {
    text-align: center;
    padding-top: 50px;
    padding-bottom: 50px;
}

header h1 {
    font-size: 40px;
}

div {
    text-align: center;
    padding-top: 20px;
    padding-bottom: 20px;
}

div img {
    padding-top: 20px;
}

article div {
    display: inline-block;
}

article div h1 {
    padding-top: 20px;
}

.ab {
    width: 200px;
    height: 200px;
}

.cd {
    width: 200px;
    height: 200px;
}

.ef {
    width: 200px;
    height: 200px;
}

.gh {
    width: 200px;
    height: 200px;
}

.one {
    width: 300px;
    height: 300px;
    background-color: wheat;
    border: 8px double orange;
    margin-bottom: 50px;
    margin-right: 50px;
}

.two {
    width: 300px;
    height: 300px;
    background-color: wheat;
    border: 8px double orange;
}

.three {
    width: 300px;
    height: 300px;
    background-color: wheat;
    border: 8px double orange;
    margin-bottom: 50px;
    margin-right: 50px;
}

.four {
    width: 300px;
    height: 300px;
    background-color: wheat;
    border: 8px double orange;
}